Box-cap hanger for gang-frames of stone-sawing machines.



J. LOGAN.

BOX CAP HANGER FOR GANG FRAMES OF STONE SAWING MACHINES.

APPLICATION FILED FEB. 17 1915.

mmunm MED sr'rs PAT @FFTQE.

AMES- umo emlie s MI S UR Box-cnei mneEn-FoneANceERAMEs orsroivn-sawrnemacnmns.

,App1icetion iil egiififebr iaryli, 191 5. Serial No.; 8,843.

To all whom it may concern:

. Be t known t a ,-J E L sA ,.a r s dent ,of and I whose ;.p ost-.olfice address I is Carthage, Missouri, have invented ,a new anduseful Improvement in Box-Cap v Hangers for Gang-Frames of Stone;Sawing,l /lachines, which invention is fully set forth in the followingspecification.

This invention relates to an improvement in, gang frames forstone-sawing machines, and more particularly to the box caphangersemployed to support the gang frames. In machines of thischaracter it is usual to support the extremely heavy. gang 1 frames forthe stone-saws upon. the framework of the machine by means of dependinghanger bars, which barsare mounted toswing p encluluin-like in theframework of the machine, and: the heavy .gang-saw frame is pivotallyconnected to the lower end of. said hanger bars. By reason of .thegreat.weight of the gang frameand its supported saws, and the fact that theyare almostcontinw ously operated under conditions where grinding sandand grit from the .sawn stone gets into the bearings, the pivotalbearing connections between the gang-saw ,frame and the lower end ofthe'hanger bars wear away very rapidly, and necessitate frequentadjustments to preserve the parts in proper working order, and suchadjustmentslmve heretofore required .av considerable amount of time,owing to the.necessityof,disassembling the hanger box cap and the,insertion of wear pieces or the employment of other devices to take upthe wear.

The particular object of thepresent invention is to provide a hanger boxcap, so called, in which the pivotal bearings connecting the saw gangframe to the hanger bars shall be protected-as much,as,poss ible fromthe entrance of abrasive material, which would cause rapid wear of theparts, and furthermore, to provide means for quickly and effectivelyadjusting the parts to take up wear without disa-ssemblage. By thepresent invention, this adjustment is accomplished in a very fewmoments, so that the interruption of the active work of the machine iscomparatively short.

The inventive idea involved is illustrated in the accompanying drawings,in which- Figure 1 is a perspective view of one em: bodiment of theinvention; Fig. 2 is a central vertical section with parts shown inelevation; 3 is a bottom plan view of t pper. portion ofv thebox capand,-Fig.

.. 4:, is a penspective view-ofpne part ofthe ..de i xfp .adias m nm takpr Befer ring ito the drawings, ,in. which like reference numeralsindicate like parts throughout the several.=views,.1- is the depending.hangerbar of the usual or any suitable. constructionin a stonesawingmachine, and.2. is ,,one corner ,portionof the gang saw frame,,,to. which there is bolted a, trunnion bracket. 3 projecting verticallyupward therefrom, and. having a trunnion. 4, extending horizontally;therefrom, as clearly shown in -Fig.., 2. Sec11i'ecl by theiboltsjifi,tothe .lowenend ofthehangenbar 1,1s .the upper ,orcap portion:Gof-thehanger box. This cap portion of thebox .is shown in perspective ingFig,1,.1in section in F ig. 2, and in bottom .plan view in Fig; 8. Formed inthe pp vir i i .-th ap. Vi ta-g o 7 extending paralleLwith the trunnion4; when the partsareassembled, and the roof or upper portion of thegroove'7-is'formed on a.downward inclineflfrompne end thereof to theother. This, groove? extends in the. cap ,6 for approximatelythelengthof the trunnion there is formedwithin the cap 6, tothe left. ofthe groove, as shown in Figi 2, a chamber 8 opening downward, while theleft-hand 'wall of this chamber has formed therein a vertical slot 9,for-a,purpose which ,.will be hereinafter described.

7 The .cap portion 6 of the hanger box has pppositely. disposed laterallugs .10, 10, with vertical perforations therethrough, and the lowerportion ,oftheg hanger box 11 .has formed, thereon corresponding lugs12,12, -.also ,ihaving vertical perforations therethr sh, s d l e por i;havi g formed therein a concave bearing surface 13 constit ltingthehearing proper for the. trunnion ehon the bracket 3. The trunnion beingplaced in position, the two parts of the hanger box are bolted togetherby means of bolts 14, 14 (Fig. 1), extending through the respective lugs10 and 12 on the two parts of the box, with a wedge-shaped block 15having a lower concave surface 16 (Fig. 41-) resting upon the trunnion4L, and an upper surface 17 downwardly inclined and resting in contactwith the downwardly inclined roof of the groove 7 Securely connected tothe block 15 is a rod 18, which extends outward through the chamber 8and through the slot 9 formed in the cap 6, and this rod 18 has formedon its end portion screw-threads for receiving nuts 19 and 20 by meansof which the rod 18, and therefore the block 15 which forms the upperbearing surface for the trunnion 4, is locked in position.

It will be observed that the parts are protected from any foreign matterfalling into the bearings from above by reason of the construction ofthe cap 6. Incase of a wearing of the parts, and particularly of thetrunnion 4 and of the bearing 18 therefor, such wear may be quickly andefiectively taken up by loosening the nut 20 and tightening up the nut19, after which the nut 20 will be again tightened, and the machine isthen ready to be set into operation again. During the tighteningoperation, as the block 15 is moved from right to left in Fig. 1, and byreason of the wear on the trunnion and the trunnion bearing 13, thelevel of the block 15, and therefore of the rod 18, will be lowered, andthe slot 9 in the left-hand end of the cap 6 provides for this loweringmovement of the rod and the block 15 throughout the several adjustmentsthat may be necessary during the life of the trunnion and the trunnionbearing 13.

In the act of adjusting the position of the adjusting block 15, the nut20 can be reached from below, while nut 19, of course, is readilyreached from the outside.

It has been found inpractice that this means of protecting the trunnionbearings from undue wear and taking up the wear when the same occurs ismost efficient, and that it materially prolongs the life of the parts,and enables proper adjustments, when necessary, to be made in a minimumspace of time.

What is claimed is 1. In a box cap hanger for gan -saw frames forstone-sawing machines, the combination of a hanger-bar, a hanger-box capsecured thereto and having a groove formed in its top wall, said groovehaving its upper surface portion downwardly inclined, a gang-saw-frametrunnion, a bearing for said trunnion secured to said cap, a bearingblock resting on said trunnion and having its upper surface engaging theinclined surface of said groove, a rod secured to said block andextending outward through a slot in said cap, and adjusting meansexterior to the said cap and engaging said rod.

2. In a box cap hanger for gangsaw frames for stone-sawing machines, thecombination of the box-cap and the lower hearing secured thereto, withthe trunnion resting in said lower bearing, an upper bearing blockresting on said trunnion and movable parallel with the axis of saidtrunnion in a downwardly inclined groove formed in the upper wall of thecap, a rod secured to said block and extendingout through the wall ofsaid cap, and adjusting means exterior to said cap and engaging saidrod. I

3. In a box cap hanger for gang saw frames for stone-sawing machines,the combination of the box-cap and the lower hearing secured thereto,with a gang-saw-frame trunnion resting in said lower bearing, awedge-shaped block having its lower side concaved to fit said trunnionand its upper side downwardly inclined and contacting with-acorrespondingly inclined surface in said cap, a screw-threaded rodsecured to said block and extending out through a vertical slot in thecap, and nuts on said rod on opposite sides of the wall of said cap.

4. In a device of the character described, the combination of thecaphaving an interior chamber opening downward and a downwardly inclinedgroove formed on the inner side of the roof portion thereof, atrunnion,'a wedge-shaped block movable in said groove and forming theupper bearing for said trunnion, a lower bearing for the trunnion, andmeans on the exterior of the cap for adjusting the block in said groove.

in testimony whereof I have signed this specification in the presence oftwo subscribing Witnesses.

JAMES LOGAN.

Witnesses:

G. E. GERKEY, T. W. RALsroN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

